MANLEY PLATINUM SERIES Lightweight Pistons, -18cc Dish [Bore Size 4.165 | Rod Length 6.460 | Stroke 4.250 | Compression Distance 1.115 | Pin Diameter .927 | 64cc 11.1 | 66cc 10.9 | 70cc 10.5 | 72cc 10.3 | 78cc 9.8 | Piston Wt/Gms 460 | Piston & Pin Wt/Gms 578] (GM LS) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS